What was the major contributor of oxygen to earth's early atmosphere?

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asked Mar 28, 2018 145k views

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Elheni Mokhles · Answer 1 · 2018-03-29T06:46:33+0000

It's a bacteria that grew along all the ocean coast that took in carbon and through photosynthesis, turned it into oxygen, the process took about a billion years.

What was the major contributor of oxygen to earth's early atmosphere?

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